Open AccessDetermination of reaction rate constant for increasing pH level in geothermal hot spring
Author(s) -
B. C. Mauren,
N. I. Kharisma,
Andang Widi Harto
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/451/1/012088
Subject(s) - hot spring , geothermal gradient , spring (device) , geothermal energy , sulfate , arrhenius equation , chemistry , reaction rate constant , activation energy , mineralogy , thermodynamics , analytical chemistry (journal) , geology , environmental chemistry , physics , kinetics , paleontology , organic chemistry , quantum mechanics , geophysics
Geothermal hot spring can be used as source of hot bath. It contains mineral elements such as Cl − , K + , Na + , and SO 4 2− . One of geothermal hot springs in Leilem, Sulawesi Utara, is categorized as Acid Sulfate Water. Leilem geothermal hot spring contains high acid sulfate and causing the pH level reach to 1. Leilem hot bath is categorized into acidic type. In order to reach mildly acidic type, the pH level should be up to 4. The method research to increase the pH level is to flow the hot water to the stack of CaCO 3 . To design the system, the reaction rate constant should be known. These constants are assumed to follow the Arrhenius’ equation, k = A e^((- E a )/RT).The value of frequency factor (A) and activation energy ( E a ) are collected through a laboratory scale experiment of H 2 SO 4 with CaCO 3 (powder) by using variant variables of the temperature of water and the mass of CaCO 3 . Based on the result of the experiment the value of A is 1.8 and E a 18.515 J(gmol) −1 and the research successfully increases the pH up to 4 or even higher.